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#ifndef SCM_SNARF_H
#define SCM_SNARF_H
/* Copyright 1995-2004,2006,2009-2011,2013-2014,2017-2019
Free Software Foundation, Inc.
This file is part of Guile.
Guile is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Guile is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Guile. If not, see
<https://www.gnu.org/licenses/>. */
#include <libguile/scm.h>
/* Macros for snarfing initialization actions from C source. */
#ifdef SCM_ALIGNED
/* We support static allocation of some `SCM' objects. */
# define SCM_SUPPORT_STATIC_ALLOCATION
#endif
/* C preprocessor token concatenation. */
#define scm_i_paste(x, y) x ## y
#define scm_i_paste3(a, b, c) a ## b ## c
/* Generic macros to be used in user macro definitions.
*
* For example, in order to define a macro which creates ints and
* initializes them to the result of foo (), do:
*
* #define SCM_FOO(NAME) \
* SCM_SNARF_HERE (int NAME) \
* SCM_SNARF_INIT (NAME = foo ())
*
* The SCM_SNARF_INIT text goes into the corresponding .x file
* up through the first occurrence of SCM_SNARF_DOC_START on that
* line, if any.
*
* Some debugging options can cause the preprocessor to echo #define
* directives to its output. Keeping the snarfing markers on separate
* lines prevents guile-snarf from inadvertently snarfing the definition
* of SCM_SNARF_INIT if those options are in effect.
*/
#ifdef SCM_MAGIC_SNARF_INITS
# define SCM_SNARF_HERE(X)
# define SCM_SNARF_INIT_PREFIX ^^
# define SCM_SNARF_INIT(X) SCM_SNARF_INIT_PREFIX X ^:^
# define SCM_SNARF_DOCS(TYPE, CNAME, FNAME, ARGLIST, REQ, OPT, VAR, DOCSTRING)
#else
# ifdef SCM_MAGIC_SNARF_DOCS
# define SCM_SNARF_HERE(X)
# define SCM_SNARF_INIT(X)
# define SCM_SNARF_DOCS(TYPE, CNAME, FNAME, ARGLIST, REQ, OPT, VAR, DOCSTRING) \
^^ { \
cname CNAME ^^ \
fname FNAME ^^ \
type TYPE ^^ \
location __FILE__ __LINE__ ^^ \
arglist ARGLIST ^^ \
argsig REQ OPT VAR ^^ \
DOCSTRING ^^ }
# else
# define SCM_SNARF_HERE(X) X
# define SCM_SNARF_INIT(X)
# define SCM_SNARF_DOCS(TYPE, CNAME, FNAME, ARGLIST, REQ, OPT, VAR, DOCSTRING)
# endif
#endif
/* Low-level snarfing for static memory allocation. */
#ifdef SCM_SUPPORT_STATIC_ALLOCATION
#define SCM_IMMUTABLE_CELL(c_name, car, cdr) \
static SCM_ALIGNED (8) const SCM c_name ## _raw [2] = \
{ SCM_PACK (car), SCM_PACK (cdr) }; \
static SCM_UNUSED const SCM c_name = SCM_PACK (& c_name ## _raw)
#define SCM_IMMUTABLE_DOUBLE_CELL(c_name, car, cbr, ccr, cdr) \
static SCM_ALIGNED (8) const SCM c_name ## _raw [4] = \
{ SCM_PACK (car), SCM_PACK (cbr), SCM_PACK (ccr), SCM_PACK (cdr) }; \
static SCM_UNUSED const SCM c_name = SCM_PACK (& c_name ## _raw)
#endif /* SCM_SUPPORT_STATIC_ALLOCATION */
/* Documentation. */
#ifdef SCM_MAGIC_SNARF_DOCS
#undef SCM_ASSERT
#define SCM_ASSERT(_cond, _arg, _pos, _subr) ^^ argpos _arg _pos __LINE__ ^^
#endif /* SCM_MAGIC_SNARF_DOCS */
#endif /* SCM_SNARF_H */
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